|Table of Contents|

Citation:
　Jian Zhang,Huilong Ren and Lijie Zhang.A Nonlinear Restoring Effect Study of Mooring System and its Application[J].Journal of Marine Science and Application,2012,(1):74-82.[doi:10.1007/s11804-012-1108-3]
Click and Copy

A Nonlinear Restoring Effect Study of Mooring System and its Application

Info

Title:
A Nonlinear Restoring Effect Study of Mooring System and its Application
Author(s):
Jian Zhang;  Huilong Ren and Lijie Zhang
Affilations:
Author(s):
Jian Zhang;  Huilong Ren and Lijie Zhang
1. College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, China 2. Tianjin Centrans Shipping Management Co., Ltd., Tianjin 300000, China
Keywords:
coupled analysis;  nonlinear restoring force;  mooring system;  lower frequency drift motion
分类号:
-
DOI:
10.1007/s11804-012-1108-3
Abstract:
Mooring system plays an important role in station keeping of floating offshore structures. Coupled analysis on mooring-buoy interactions has been increasingly studied in recent years. At present, chains and wire ropes are widely used in offshore engineering practice. On the basis of mooring line statics, an explicit formulation of single mooring chain/wire rope stiffness coefficients and mooring stiffness matrix of the mooring system were derived in this article, taking into account the horizontal restoring force, vertical restoring force and their coupling terms. The nonlinearity of mooring stiffness was analyzed, and the influences of various parameters, such as material, displacement, pre-tension and water depth, were investigated. Finally some application cases of the mooring stiffness in hydrodynamic calculation were presented. Data shows that this kind of stiffness can reckon in linear and nonlinear forces of mooring system. Also, the stiffness can be used in hydrodynamic analysis to get the eigenfrequency of slow drift motions.

References:

Chen XB (2006). Middle-field formulation for the computation of wave-drift loads. Journal of Engineering Mathematics. 59, 61-82.
Chen XB, Rezende F (2009). Efficient computations of second-order low-frequency wave load. International Conference on Ocean, Offshore and Arctic Engineering, Honolulu, Hawaii, USA, 79522.
Couliard PY, Langley RS (2001). Nonlinear dynamics of deep-water moorings. International Conference on Offshore Mechanics and Arctic Engineering, Rio de Janeiro, 1020.
Cunff CL, Ryu S, Heurtier JM, Duggal AS (2008). Frequency-domain calculations of moored vessel motion including low frequency effect. International Conference on Offshore Mechanics and Arctic Engineering, Estoril, Portugal, 57632.
Garrett DL (2005). Coupled analysis of floating production system. Ocean Engineering, 32(2), 802-816.
Huang XL, Fan J, Zhu XY (1999). The comparison between the frequency method and time domain method in the dynamic analysis of a mooring line. International Conference on Offshore Mechanics and Arctic Engineering, St. Johns, Canada, 4061.
Kim BK, Michael MB (2001). Nonlinear dynamics and stability of spread mooring with riser. Applied Ocean Research, 23(1), 111-123.
Kim MH, Koo BJ, Mercier RM, Ward EG (2005). Vessel/mooring/riser coupled dynamic analysis of a turret-moored FPSO compared with OTRC experiment. Ocean Engineering, 32(3), 1780-1802.
Li Runpei, Wang Zhinong (1992). Strength analysis of ocean platforms. Shanghai Jiao Tong University Press, Shanghai, 1-50. (in Chinese)
Loukogeorgaki E, Angelides DC (2005). Stiffness of mooring lines and performance of floating breakwater in three dimensions. Applied Ocean Research, 27(3), 187–208.
Low YM, Langley RS (2008). A hybrid time/frequency domain approach for efficient coupled analysis of vessel/mooring/riser dynamics. Ocean Engineering, 35(2), 433-446.
Ma Shan, Shi S, Kim MH (2008). Second-order low-frequency wave forces on a SPM offloading tanker in shallow water. International Conference on Offshore Mechanics and Arctic Engineering, Estoril, Portugal, 58048.
Ren Huilong, Zhang Haibin, Dai Yuzhi, Song Jingzheng (2003). 3-D computational method of wave loads on turret moored FPSO tankers. Journal of Marine Science and Application, 2(1), 22-25.
Tahar A, Kim MH (2003). Hull/mooring/riser coupled dynamic analysis and sensitivity study of a tanker-based FPSO. Applied Ocean Research, 25(2), 367-382.
Zhang Jian (2008). Coupled dynamic analysis of platform and flexible members in frequency domain. Master thesis, Harbin Engineering University, 35-43. (in Chinese)

Memo

Memo:
Supported by the National Natural Science Foundation of China under Grant No.51079034.
Last Update: 2012-03-16